'use strict'

class content {

  constructor() {
    //param默认就是/:id，若要改变路由，则可以设置此属性，比如设置为/:name
    //this.param = '/:id'
  }

  __mid(){         //只对当前文件post，delete函数起作用
    return[
     {
        name:'token-verify',
        path:['post','delete']
     }
    ]
  }

  //以下方法，若不需要，要去掉，避免无意义的路由。

  //获取资源具体内容
  //对应路由  GET /content/:id
  async get(c) {
    let id = c.param.id
    let sqltext = 'SELECT id,detail,title,update_time FROM content WHERE id=$1'
    let r = await c.service.psql.query(sqltext, [id])
    if (r.rowCount === 0) {
      return c.status(404).send('not found');
    }
    c.send(r.rows[0])
  }

  //创建资源
  //对应路由 POST /content
  async post(c) {
    try {
      //c.body是提交的请求体数据
      let data = JSON.parse(c.body)
      let sqltext = 'INSERT INTO content (id,detail,title,add_time,update_time) VALUES($1,$2,$3,$4,$5)'

      // 随机数转乘16进制字符串并去掉前两位，字符串作为id
      let id = Math.random().toString(16).substring(2)
      let tm = Date.now()
      let r = await c.service.psql.query(sqltext, [
        id, data.detail, data.title, tm, tm
      ])

      if (r.rowCount === 0) {
        return c.status(500).send('failed')
      }
      c.send(id)
    } catch (err) {
      console.error(err)
      c.status(400).send('bad data')
    }
  }

  //更新资源
  // 对应路由  PUT /content/:id
  async put(c) {

  }

  //获取列表
  //对应路由  GET /content
  async list(c) {
    let sqltext = 'SELECT id,title,update_time FROM content'
    let r = await c.service.psql.query(sqltext)
    c.send(r.rows)
  }

  //删除资源
  //对应路由  DELETE  content/:id
  async delete(c) {
    let r = await c.service.psql.query(`DELETE FROM content WHERE id=$1`, [c.param.id])
    c.send({
      count: r.rowCount
    })
  }
}

module.exports = content
